Abstract
Co/Pd and Co/Pt multilayers have been fabricated on ultra-thin (2 nm) indium tin oxide (ITO) seed layers with soft underlayer for perpendicular magnetic recording. The coercivity of the Co/Pd multilayers was increased from 5.1 kOe to 6.3 kOe by increasing the thickness of the initial Pd layer from 1 nm to 2 nm. Hysteresis loops with an almost perfect remanent squareness, high nucleation field, and more sheared sides were obtained. TEM analysis shows that the films have well-segregated columnar structures which help to reduce exchange coupling and increase coercivity. Spin-stand testing shows that the Co/Pd multilayers have a D50 about 157 kfci without differentiating the output signals. Co/Pt multilayers with ITO seed layers deposited in 40 mTorr of Kr give a coercivity of 6.9 kOe and a D50 about 290 kfci when the output signal is differentiated.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1577-1579 |
| Number of pages | 3 |
| Journal | IEEE Transactions on Magnetics |
| Volume | 37 |
| Issue number | 4 I |
| DOIs | |
| State | Published - Jul 2001 |
| Event | 8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States Duration: Jan 7 2001 → Jan 11 2001 |
Bibliographical note
Funding Information:Manuscript received October 13, 2000; revised January 15, 2001. This work was supported by the National Storage Industrial Consortium EHDR Program (partly supported by NSF, Award EEC-9732369), and the Seagate Technology. The authors are with the Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455 USA. Publisher Item Identifier S 0018-9464(01)06861-3.
Keywords
- Co/Pd multilayers
- Co/Pt muitilayers
- Indium tin oxide seed layers
- Perpendicular magnetic recording